DP Physics Questionbank

Description

Nature of science:
Modelling: Electrical theory demonstrates the scientific thought involved in the development of a microscopic model (behaviour of charge carriers) from macroscopic observation. The historical development and refinement of these scientific ideas when the microscopic properties were unknown and unobservable is testament to the deep thinking shown by the scientists of the time. (1.10)

Understandings:

• Charge
• Electric field
• Coulomb’s law
• Electric current
• Direct current (dc)
• Potential difference

Applications and skills:

• Identifying two forms of charge and the direction of the forces between them
• Solving problems involving electric fields and Coulomb’s law
• Calculating work done in an electric field in both joules and electronvolts
• Identifying sign and nature of charge carriers in a metal
• Identifying drift speed of charge carriers
• Solving problems using the drift speed equation
• Solving problems involving current, potential difference and charge

Guidance:

• Students will be expected to apply Coulomb’s law for a range of permittivity values

Data booklet reference:

International-mindedness:

• Electricity and its benefits have an unparalleled power to transform society

Theory of knowledge:

• Early scientists identified positive charges as the charge carriers in metals; however, the discovery of the electron led to the introduction of “conventional” current direction. Was this a suitable solution to a major shift in thinking? What role do paradigm shifts play in the progression of scientific knowledge?

Utilization:

• Transferring energy from one place to another (see Chemistry option C andPhysics topic 11)
• Impact on the environment from electricity generation (see Physics topic 8 andChemistry option sub-topic C2)
• The comparison between the treatment of electric fields and gravitational fields (see Physics topic 10)

Aims:

• Aim 2: electrical theory lies at the heart of much modern science and engineering
• Aim 3: advances in electrical theory have brought immense change to all societies
• Aim 6: experiments could include (but are not limited to): demonstrations showing the effect of an electric field (eg using semolina); simulations involving the placement of one or more point charges and determining the resultant field
• Aim 7: use of computer simulations would enable students to measure microscopic interactions that are typically very difficult in a school laboratory situation

Directly related questions

• 18M.2.HL.TZ1.4b: Calculate the drift speed v of the electrons in the conductor in cm s–1.
• 18M.2.HL.TZ2.9c.i: Show that the speed v of an electron in the hydrogen atom is related to the radius r of the orbit...
• 18M.2.HL.TZ2.8c.ii: Calculate, in A, the average current during the discharge.
• 18M.1.SL.TZ2.20: An electron enters the region between two charged parallel plates initially moving parallel...
• 18M.2.SL.TZ1.4b: Calculate the drift speed v of the electrons in the conductor in cm s–1. State your answer to an...
• 18M.2.HL.TZ1.8c.ii: An electron is emitted from the photoelectric surface with kinetic energy 2.1 eV. Calculate the...
• 18M.2.HL.TZ1.4c.ii: Show that \(\frac{v}{E} = \frac{1}{{ne\rho }}\).
• 18M.2.HL.TZ1.4c.i: Determine the electric field strength E.
• 18M.1.HL.TZ1.15: An ion of charge +Q moves vertically upwards through a small distance s in a uniform vertical...
• 17N.2.HL.TZ0.8c: The electron is replaced by a proton which is also released from rest at X. Compare, without...
• 17N.2.HL.TZ0.8b: An electron is placed at X and released from rest. Draw, on the diagram, the direction of the...
• 17N.2.HL.TZ0.8a: Outline what is meant by electric field strength.
• 17N.2.HL.TZ0.2d: Satellite X must release ions into the space between the satellites. Explain why the current in...
• 17N.1.HL.TZ0.15: Two wires, X and Y, are made from the same metal. The wires are connected in series. The radius...
• 17M.2.SL.TZ2.5a: The copper wires and insulator are both exposed to an electric field. Discuss, with reference to...
• 17M.1.HL.TZ2.15: Positive charge is uniformly distributed on a semi-circular plastic rod. What is the direction of...
• 17M.1.HL.TZ1.17: Electrons, each with a charge e, move with speed v along a metal wire. The electric current in...
• 17M.1.SL.TZ2.19: A wire has variable cross-sectional area. The cross-sectional area at Y is double that at...
• 17M.1.SL.TZ2.18: The diagram shows two equal and opposite charges that are fixed in place. At which points is...
• 17M.1.SL.TZ1.20: A cell is connected in series with a resistor and supplies a current of 4.0 A for a time of 500...
• 17M.1.SL.TZ1.19: An electron is accelerated through a potential difference of 2.5 MV. What is the change in...
• 17M.1.SL.TZ1.18: The graph shows the variation of current with potential difference for a filament lamp. What...
• 17M.1.SL.TZ1.15: Two pulses are travelling towards each other. What is a possible pulse shape when the pulses...
• 16M.2.SL.TZ0.5c: A connecting wire in the circuit has a radius of 1.2mm and the current in it is 3.5A. The number...
• 16N.1.SL.TZ0.18: A –5µC charge and a +10µC charge are a fixed distance apart. Where can the electric field be...
• 16M.1.SL.TZ0.18: Three...
• 15M.1.SL.TZ2.16: What is the definition of electric current? A. The ratio of potential difference across a...
• 15M.2.SL.TZ2.5e: The 24 Ω resistor is covered in an insulating material. Explain the reasons for the differences...
• 15M.2.SL.TZ2.6e: Six point charges of equal magnitude Q are held at the corners of a hexagon with the signs of the...
• 15M.2.HL.TZ2.9a: A 24Ω resistor is made from a conducting wire. (i) The diameter of the wire is 0.30 mm and the...
• 14M.2.SL.TZ1.3a: Calculate the magnitude of the electric force acting on the proton when it is in the electric field.
• 14M.2.SL.TZ1.3b: A uniform magnetic field is applied in the same region as the electric field. A second proton...
• 15N.1.SL.TZ0.22: A \( + 3{\text{ C}}\) charge and a \( - 4{\text{ C}}\) charge are a distance \(x\) apart. P is a...
• 15N.2.HL.TZ0.9g.ii: Each cubic metre of the wire contains approximately \(8.5 \times {10^{28}}\) free electrons. The...
• 14N.2.SL.TZ0.6g.i: Show that the magnitude of the electric field strength at the surface of the sphere is about...
• 14N.2.SL.TZ0.6h.ii: Discuss the subsequent motion of the electron.
• 14N.2.SL.TZ0.6g.ii: On the axes, draw a graph to show the variation of the electric field strength \(E\) with...
• 14N.2.SL.TZ0.6h.i: Calculate the initial acceleration of the electron.
• 14M.2.HL.TZ2.8a: (i)     Distinguish between an insulator and a conductor. (ii)     Outline what is meant by the...
• 14M.2.SL.TZ2.5e: Distinguish between an insulator and a conductor.
• 11N.1.SL.TZO.19: Which of the following is the SI unit of gravitational field strength? A. NB. N mC. Nkg–1D. Nm2kg–2
• 11N.1.SL.TZO.20: Which of the following is the best representation of the electric field lines around a negatively...
• 12N.1.SL.TZ0.21: An electron has a kinetic energy of 4.8×10–10J. What is the equivalent value of this kinetic...
• 13N.1.SL.TZ0.20: Which diagram represents the pattern of electric field lines of two small positive point charges...
• 13M.2.SL.TZ1.7b: The diagram shows a pair of horizontal metal plates. Electrons can be deflected vertically using...
• 13M.2.SL.TZ1.7c: The diagram shows two isolated electrons, X and Y, initially at rest in a vacuum. The initial...
• 13M.2.SL.TZ1.7a: Define electric field strength.
• 12M.1.SL.TZ1.16: The ampere is defined in terms of A. power dissipated in a wire of known length, cross-sectional...
• 12M.1.SL.TZ2.20: Coulomb’s law refers to electric charges that are A. on any charged objects.B. charged hollow...
• 11M.1.SL.TZ2.16: Two electrodes, separated by a distance d, in a vacuum are maintained at a constant potential...
• 11M.1.SL.TZ2.20: Two isolated point charges, -7 μC and +2 μC, are at a fixed distance apart. At which point is...
• 13M.2.SL.TZ2.6b: In a simple model of the hydrogen atom, the electron can be regarded as being in a circular orbit...
• 11M.1.HL.TZ2.6: The diagram below shows a uniform electric field of...
• 13M.2.SL.TZ2.6a: State Coulomb’s law.
• 11M.1.SL.TZ2.22: Which nucleons in a nucleus are involved in the Coulomb interaction and the...
• 11M.1.HL.TZ2.21: Two isolated point charges,...
• 13M.1.HL.TZ2.25: The electric potential is VR at a point R in an electric field and at another point S the...
• 12M.2.SL.TZ2.7a: Ionized hydrogen atoms are accelerated from rest in the vacuum between two vertical parallel...
• 12M.2.SL.TZ2.9a: The magnitude of gravitational field strength g is defined from the equation shown...
• 12M.2.HL.TZ2.7a: The magnitude of gravitational field strength g is defined from the equation shown...
• 12M.2.HL.TZ2.7b: In a simple model of the hydrogen atom, the electron is regarded as being in a circular orbit...
• 11N.2.SL.TZ0.2a: Tungsten is a conductor used as the filament of an electric lamp. The filament of the lamp is...
• 11N.2.HL.TZ0.10a: (i) On the diagram above, draw an arrow to show the direction of the electric field at point...
• 13N.2.SL.TZ0.4a: Define electric field strength.
• 13N.2.SL.TZ0.4b: A simple model of the proton is that of a sphere of radius 1.0×10–15m with charge concentrated at...
• 11M.1.SL.TZ1.17: One electronvolt is equal to A. 1.6×10−19 C.B. 1.6×10−19 J.C. 1.6×10−19 V.D. 1.6×10−19 W.
• 11M.1.HL.TZ1.22: A positively charged particle follows a circular path as shown below. Which of the following...
• 11M.2.SL.TZ1.2a: The electron’s path while in the region of magnetic field is a quarter circle. Show that the (i)...
• 09M.1.SL.TZ1.20: Which diagram best represents the electric field due to a negatively charged conducting sphere?
• 10M.1.SL.TZ1.20: Three positive point charges of equal magnitude are held at the corners X, Y and Z of a...
• 09N.1.HL.TZ0.9: Four point charges of magnitudes \( + q\), \( + q\), \( - q\), and \( - q\) are held in place at...
• 09N.1.SL.TZ0.20: Which of the following diagrams illustrates the electric field pattern of a negatively charged...
• 10N.2.SL.TZ0.B2Part1.b: A thundercloud can be modelled as a negatively charged plate that is parallel to the...
• 10N.2.SL.TZ0.B2Part1.c: (i)     Determine the magnitude of the electric field between the base of the thundercloud and...